1 2--- 3title: "Skia Perf" 4linkTitle: "Skia Perf" 5 6--- 7 8 9[Skia Perf](https://perf.skia.org) is a web application for analyzing and 10viewing performance metrics produced by Skia's testing infrastructure. 11 12<img src=../Perf.png style="margin-left:30px" align="left" width="800"/> <br clear="left"> 13 14Skia tests across a large number of platforms and configurations, and each 15commit to Skia generates more than 400,000 individual values that are sent to 16Perf, consisting mostly of performance benchmark results, but also including 17memory and coverage data. 18 19Perf offers clustering, which is a tool to pick out trends and patterns in large sets of traces. 20 21<img src=../Cluster.png style="margin-left:30px" align="left" width="400"/> <br clear="left"> 22 23And can generate alerts when those trends spot a regression: 24 25<img src=../Regression.png style="margin-left:30px" align="left" width="800"/> <br clear="left"> 26 27 28## Calculations 29 30Skia Perf has the ability to perform calculations over the test data 31allowing you to build up interesting queries. 32 33This query displays the ratio of playback time in ms to the number of ops for desk\_wowwiki.skp: 34 35 ratio( 36 ave(fill(filter("name=desk_wowwiki.skp&sub_result=min_ms"))), 37 ave(fill(filter("name=desk_wowwiki.skp&sub_result=ops"))) 38 ) 39 40You can also use the data to answer questions like how many tests were run per commit. 41 42 count(filter("")) 43 44See Skia Perf for the [full list of functions available](https://perf.skia.org/help/). 45 46
